package com.xscr.api.utils.json;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import net.sf.ezmorph.object.DateMorpher;
import net.sf.json.JSON;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import net.sf.json.JsonConfig;
import net.sf.json.util.JSONUtils;
import net.sf.json.util.PropertyFilter;
import net.sf.json.xml.XMLSerializer;


public class JsonUtils {

	/** 页面传至后台时，json数据在request的参数名�?*/
	public final static String JSON_ATTRIBUTE = "json";
	public final static String JSON_ATTRIBUTE1 = "json1";
	public final static String JSON_ATTRIBUTE2 = "json2";
	public final static String JSON_ATTRIBUTE3 = "json3";
	public final static String JSON_ATTRIBUTE4 = "json4";

	/**
	 * 从一个JSON 对象字符格式中得到一个java对象，形如： {"id" : idValue, "name" : nameValue,
	 * "aBean" : {"aBeanId" : aBeanIdValue, ...}}
	 * 
	 * @param object
	 * @param clazz
	 * @return
	 */
	public static <T> Object getDTO(String jsonString, Class<T> clazz) {
		JSONObject jsonObject = null;
		try {
			setDataFormat2JAVA();
			jsonObject = JSONObject.fromObject(jsonString);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return JSONObject.toBean(jsonObject, clazz);
	}

	/**
	 * 从一个JSON 对象字符格式中得到一个java对象，其中beansList是一类的集合，形如： {"id" : idValue, "name" :
	 * nameValue, "aBean" : {"aBeanId" : aBeanIdValue, ...}, beansList:[{}, {},
	 * ...]}
	 * 
	 * @param jsonString
	 * @param clazz
	 * @param map
	 *            集合属�?的类�?(key : 集合属�?�? value : 集合属�?类型class) eg: ("beansList" :
	 *            Bean.class)w
	 * @return
	 */
	@SuppressWarnings("rawtypes")
	public static Object getDTO(String jsonString, Class clazz, Map map) {
		JSONObject jsonObject = null;
		try {
			setDataFormat2JAVA();
			jsonObject = JSONObject.fromObject(jsonString);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return JSONObject.toBean(jsonObject, clazz, map);
	}

	/**
	 * 从一个JSON数组得到�?��java对象数组，形如： [{"id" : idValue, "name" : nameValue}, {"id" :
	 * idValue, "name" : nameValue}, ...]
	 * 
	 * @param object
	 * @param clazz
	 * @return
	 */
	@SuppressWarnings("rawtypes")
	public static Object[] getDTOArray(String jsonString, Class clazz) {
		setDataFormat2JAVA();
		JSONArray array = JSONArray.fromObject(jsonString);
		Object[] obj = new Object[array.size()];
		for (int i = 0; i < array.size(); i++) {
			JSONObject jsonObject = array.getJSONObject(i);
			obj[i] = JSONObject.toBean(jsonObject, clazz);
		}
		return obj;
	}

	/**
	 * 从一个JSON数组得到�?��java对象数组，形如： [{"id" : idValue, "name" : nameValue}, {"id" :
	 * idValue, "name" : nameValue}, ...]
	 * 
	 * @param object
	 * @param clazz
	 * @param map
	 * @return
	 */
	@SuppressWarnings("rawtypes")
	public static Object[] getDTOArray(String jsonString, Class clazz, Map map) {
		setDataFormat2JAVA();
		JSONArray array = JSONArray.fromObject(jsonString);
		Object[] obj = new Object[array.size()];
		for (int i = 0; i < array.size(); i++) {
			JSONObject jsonObject = array.getJSONObject(i);
			obj[i] = JSONObject.toBean(jsonObject, clazz, map);
		}
		return obj;
	}

	/**
	 * 从一个JSON数组得到�?��java对象集合
	 * 
	 * @param object
	 * @param clazz
	 * @return
	 */
	@SuppressWarnings({ "rawtypes" })
	public static List<Object> getDTOList(String jsonString, Class clazz) {
		setDataFormat2JAVA();
		JSONArray array = JSONArray.fromObject(jsonString);
		List<Object> list = new ArrayList<Object>();
		for (Iterator iter = array.iterator(); iter.hasNext();) {
			JSONObject jsonObject = (JSONObject) iter.next();
			list.add(JSONObject.toBean(jsonObject, clazz));
		}
		return list;
	}

	/**
	 * 从一个JSON数组得到�?��java对象集合，其中对象中包含有集合属�?
	 * 
	 * @param object
	 * @param clazz
	 * @param map
	 *            集合属�?的类�?
	 * @return
	 */
	@SuppressWarnings({ "rawtypes" })
	public static List<Object> getDTOList(String jsonString, Class clazz, Map map) {
		setDataFormat2JAVA();
		JSONArray array = JSONArray.fromObject(jsonString);
		List<Object> list = new ArrayList<Object>();
		for (Iterator iter = array.iterator(); iter.hasNext();) {
			JSONObject jsonObject = (JSONObject) iter.next();
			list.add(JSONObject.toBean(jsonObject, clazz, map));
		}
		return list;
	}

	/**
	 * 从json HASH表达式中获取�?��map，该map支持嵌套功能 形如：{"id" : "johncon", "name" : "小强"}
	 * 注意commons
	 * -collections版本，必须包含org.apache.commons.collections.map.MultiKeyMap
	 * 
	 * @param object
	 * @return
	 */
	public static Map<String, Object> getMapFromJson(String jsonString) {
		setDataFormat2JAVA();
		JSONObject jsonObject = JSONObject.fromObject(jsonString);
		Map<String, Object> map = new HashMap<String, Object>();
		for (Iterator<?> iter = jsonObject.keys(); iter.hasNext();) {
			String key = (String) iter.next();
			map.put(key, jsonObject.get(key));
		}
		return map;
	}

	/**
	 * 从json数组中得到相应java数组 json形如：["123", "456"]
	 * 
	 * @param jsonString
	 * @return
	 */
	public static Object[] getObjectArrayFromJson(String jsonString) {
		JSONArray jsonArray = JSONArray.fromObject(jsonString);
		return jsonArray.toArray();
	}

	/**
	 * 把数据对象转换成json字符�?DTO对象形如：{"id" : idValue, "name" : nameValue, ...}
	 * 数组对象形如：[{}, {}, {}, ...] map对象形如：{key1 : {"id" : idValue, "name" :
	 * nameValue, ...}, key2 : {}, ...}
	 * 
	 * @param object
	 * @return
	 */
	public static String getJSONString(Object object) {
		String jsonString = null;
		// 日期值处理器
		JsonConfig jsonConfig = new JsonConfig();
		jsonConfig.registerJsonValueProcessor(java.util.Date.class,
				new JsonDateValueProcessor());
		if (object != null) {
			if (object instanceof Collection || object instanceof Object[]) {
				jsonString = JSONArray.fromObject(object, jsonConfig)
						.toString();
			} else {
				jsonString = JSONObject.fromObject(object, jsonConfig)
						.toString();
			}
		}
		return jsonString == null ? "{}" : jsonString;
	}
	
	/**
	 *         
	 * @date�?011-11-8
	 * @Description：将Object对象转化为json字符�?
	 * @param object 被转化的对象
	 * @param propertyFilter 属�?过滤
	 * @return
	 */
	public static String getJSONStringByFilter(Object object, PropertyFilter propertyFilter) {
		String jsonString = null;
		// 日期值处理器
		JsonConfig jsonConfig = new JsonConfig();
		jsonConfig.registerJsonValueProcessor(java.util.Date.class,
				new JsonDateValueProcessor());
		if (propertyFilter != null) {
			jsonConfig.setJsonPropertyFilter(propertyFilter);
		}
		if (object != null) {
			if (object instanceof Collection || object instanceof Object[]) {
				jsonString = JSONArray.fromObject(object, jsonConfig)
						.toString();
			} else {
				jsonString = JSONObject.fromObject(object, jsonConfig)
						.toString();
			}
		}
		return jsonString == null ? "{}" : jsonString;
	}
	
	/**
	 * 
	 * @date�?011-10-28
	 * @Description：将对象转化为XML格式字符�?
	 * �?��额外的jar包：xom.jar
	 * @param object
	 * @return
	 */
	public static String getXMLString(Object object) {
		JsonConfig jsonConfig = new JsonConfig();
		jsonConfig.registerJsonValueProcessor(java.util.Date.class,
				new JsonDateValueProcessor());
		JSON jsonObject = null;
		if (object != null) {
			if (object instanceof Collection || object instanceof Object[]) {
				jsonObject = JSONArray.fromObject(object, jsonConfig);
			} else {
				jsonObject = JSONObject.fromObject(object, jsonConfig);
			}
		}
		XMLSerializer xmlSerializer = new XMLSerializer();
		String returnXML = (jsonObject == null) ? null : xmlSerializer.write(jsonObject);
		return returnXML;
	}

	private static void setDataFormat2JAVA() {
		// 设定日期转换格式
		JSONUtils.getMorpherRegistry().registerMorpher(
				new DateMorpher(new String[] { "yyyy-MM-dd",
						"yyyy-MM-dd HH:mm:ss" }));
	}

	public static void main(String[] arg) throws Exception {
		String s = "{status : 'success'}";
		Object obj = JsonUtils.getJSONString(s);
		System.out.println(" object : " + obj);

		String jsonString = "[{indexId: 1, indexName: '经济评审工作', staScore: 15}, {indexId: 2, indexName: '经济评审工作2', staScore: 15}]";
		List<Object> objList = getDTOList(jsonString, HashMap.class);
		System.out.println(" objList : " + objList);

		System.out.println(" objList XML : " + getXMLString(objList));
	}
}
